Crusher and pulverizer.



PATBNTBD JAN. 28. i908. P. WILLIAMS.

invento?.- Mlton Wmams GRUSHER 'AND PULVEMZER APPLICATION FILED APR.1. 1907.

UNITED srnjrns :PATENT oIrFIcn/A.

MILTON r. WILLIAMS, or sr. LoUIs, MISSOURI,- AssIG'voR To WILLIAMS PATET cRUsIIER" & PULVERIZER COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

i cnusrrnn AND PuLvnRIznR.

Specification of Letters atent.

Patented Jan. 28, 1908.

Application filed April 1| 1907- Serial No. 365.708.

Eertains to make and use the same, reference eing had to the accom anying drawings, forming part of this speci lcation, in which- Figure lis a longitudinal sectional, view through my improved machine; and Fig. 2 is a top plan view of the same.

This invention relates to a new and useful improvement in Crushers and pulverizers, the

object being to provide means for heating the grinding surface so that the machine can be used to reduce material such aswet clay, etc, which has a tendency to adhere to the grinding surface.

In the accompanying drawings I have illustrated the grinding surface as consisting of bars forming what is known as a cage, but it is obviousthat this grinding surface may be a perforated plate or any other wellknown form of grinding surface, the object being to arrange Vthe heating pipes separately from the grinding surface, but inv close contact therewith, and to rotect the heating pipes from Vthe materia which is reduced and which passes through the cage, so that said pipes will not be worn out.

n the drawings I have shown a wellknown 'type of Crusher and pulverizer commonly known as the Williams mill, such as illustrated in Patent No. 589,236, dated August 31, 1897, granted to Ine, in which 1 indicates the grinding surface, in this instance in the 4form of cage barsvhaving their outer faces slightly recessed. 2are the/heating pipes arranged in these recesses and on the outer face Vof the cage, said heating pipes belng in the form of a coil,'that is, the straightr sections which coperatewith the grinding surface connect with couplings at the sides of the grinding surface so that a continuousv l A passage for hot air or steam is provided.

In operation, hot air or steam 1s admitted to the pipes 2 which are connected, and-the heat from said pipes is transmitted'to the grinding surface.

I am aware that minor changes in the 'cony struction, arrangement and combination .of the several parts of my device can be made and substituted for those herein shown and described Without in the least departing from the nature and principle of my invention. A

Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent is: v

A crusher or pulveriz'er having a grinding surface which is y provided with openings through which the pulverized material passes, and heating pi ies arranged underneath said grinding sur ace in Contact therewith and in alinement withthe solid portions thereof,l substantiallyas described.

In testimony whereof I hereunto aiiix my signature in the presence of two witnesses,y this 28th day of March 1907. MILTON F. WILLIAMS.

iVitnesses:

F. R. CORNWALL, GEORGE .BAKEWELL 

